Answer
slope = $0$
y-intercept = $-2$
Refer to the image below for the graph.
Work Step by Step
RECALL:
The graph of an equation in the form $y=k$ is a horizontal line.
It has a slope of zero and has $k$ as its y-intercept.
All the points on the graph of this line have $k$ as their y-coordinate.
Thus, the graph of $y=-2$ is a horizontal line, has a y-intercept of $-2$, and all the points on the line have $-2$ as their y-coordinate.
Plot the y-intercept point $(0, -2)$.
Plot another point whose y-coordinate is $-2$. (e.g., $(3, -2)$).
Then, connect the two points together using a straight line.
(refer to the attached image in the answer part above)
